<template>
<div>
      <!-- 面包屑导航区 -->
<el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
</el-breadcrumb>
<!-- 卡片试图 -->
<el-card>
    <!-- 添加角色按钮区 -->
    <el-row>
        <el-col>
            <el-button type="primary">添加角色</el-button>
        </el-col>
    </el-row>
    <!-- 角色列表区域 -->
    <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row :class="['bdbottom',  i1 === 0 ? 'bdtop' : '', 'vcenter' ]" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row, item1.id)">
                        {{item1.authName}}
                        </el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级和三级权限 -->
                    <el-col :span="19">
                        <!-- 通过for循环嵌套渲染二级权限 -->
                        <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="18">
                                <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                                    {{item3.authName}}
                                </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
                <pre>
                    <!-- {{scope.row}} -->
                </pre>
            </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
        </el-table-column>
    </el-table>
</el-card>
<!-- 分配权限的对话框 -->
<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close= "setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights" >确 定</el-button>
  </span>
</el-dialog>
</div>
</template>
<script lang="ts">
export default {
    data() {
        return {
            // 所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightslist: [],
            // 树形控件绑定对象
            treeProps: {
            label: 'authName',
            children: 'children'
            },
            // 默认选中的节点ID值数组
            defkeys: [],
            // 当前即将分配权限的ID
            roleId: ''
        }
    },
    // 生命周期函数
    created() {
        // 获取所有的权限列表
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败')
            }
            this.rolelist = res.data
            // console.log(this.rolelist)
        },
        // 根据ID删除对应的权限
        async removeRightById(role, rightId) {
        // 弹出提示询问用户是否要删除
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if (confirmResult !== 'confirm') {
            return this.$message.info('取消了删除！')
        }
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
            return this.$message.error('删除权限失败！')
        }
        role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            const { data: res } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败')
            }
            // 把获取到的权限数据保存到data中去
            this.rightslist = res.data
            //  递归获取三级节点的ID
            this.getLeafkeys(role, this.defkeys)
            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到defkeys数组中
        getLeafkeys(node, arr) {
           if (!node.children) {
               return arr.push(node.id)
           }
           node.children.forEach(item => this.getLeafkeys(item, arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defkeys = []
        },
        async allotRights() {
            const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败！')
            }
            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #eee;
}
.bdbottom {
    border-bottom: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>